Use dune-matrix-vector

.gitlab-ci.yml

 ---
+# Install external dependencies
+before_script:
+  - duneci-install-module https://git.imp.fu-berlin.de/agnumpde/dune-matrix-vector.git
+
 dune:git--clang:
   image: duneci/dune:git
   script:

dune.module

@@ -7,5 +7,5 @@ Module: dune-solvers
 Version: 2.5
 Maintainer: oliver.sander@tu-dresden.de
 #depending on
-Depends: dune-common dune-grid dune-istl dune-localfunctions
+Depends: dune-common dune-grid dune-istl dune-localfunctions dune-matrix-vector
 Suggests: dune-alugrid